原发性骨肿瘤的发生率为()。
A.10%~15%
B.5%~10%
C.1%~2%
D.2%~3%
E.3%~5%
参考答案:D
At the bell, the door opened and _____, dashing towards the dinning hall, all shouting and laughing.
A.the hungry students poured out
B.did the hungry students pour out
C.out the hungry students poured
D.out poured the hungry students
单纯滑膜结核的X线表现是
A.关节间隙狭窄,软组织肿胀
B.关节间隙增宽,骨质破坏
C.骨质疏松,软组织肿胀
D.骨质密度增高
E.骨膜反应性增生